Coffee urn



H. J. STROHBACH.

COFFEE URN.

APPLICATION FILED Dsc. 9, 192|.

M2354?. A Patentewuly 2521922.

corren rinvii'.

Specification of "Letter,C atent.

Patented July 25;, 192%,

Application led December 9, 1921. Seri-el No. 521,164-,

To all who/m, t muy concern:

Be it known that l, llenar J: Srnorisnon, n citizen ot the United States, residing at New l-orli', in the county and Stute ot New York, have invented certain new and 'usefull lfmprovenients in tfoli'ee Urns, olI which the 'following is a l'ull, clear, and exact specilicntion;

This invention relates to coffee urns and has tor its object to-provide improved and simplified means for simultaneously heating` battery' oit such urns.

,Another object is to provide one or more coli'ee' percolators connected to u boiler whereby hot water it'roin the lower portion oli' the boiler may be conducted into said percolntor or percolators above their coffee racks, and hot water may also be 'lied trom the boiler into said percolator or percolators below said racks. Means is also provided for heating the water in the boiler and percolators from a single burner arranged below said boiler. @ther objects will appear as the description proceeds.

The invention will be first hereinafter described in connection with the accompanying drawings, which constitute part of this specification, and then more specih'cally de fined in the claims at the end oi the description.

ln the accompanying` drawings, wherein similar reference characters are used to designate corresponding` parts throughout the several views:

Figure l is a broken :trent elevation ot' a battery of coffee urns constructed and con nected up substantially in accordance with this invention.

Figure E2 is a detailed plan view of the water conduit extending between the coffee urns and arranged immediately above the burner, and

Figure 3 is a similar view of a modified form of conduit.

The boiler l is preferably made in the Jforni of an upright cylinder having a bottom 2 spaced some distance above the lower edge or its walls, forming a compartment :tor housing the burner 3. The lower end portion of the walls orn the boiler below the bottom 2 may be perforated, as at e, to adn mit air for supporting the combustion of the burner. rlhe top oi' the boiler l is tted with any suitable :form of air-tight cover 5 which may be screwed in place or otherwise securely Ytastened inv position;

Percolators G and l. respectively, are arranged ut opposite sides oilll the boiler l, each ot' said percolators being also preferably made in the torm ot an upright cylinder litted with a bottom 8 arranged on a loner vlevel than the bottom 2 of vthe boiler. lach percolator has a removable-cover 9 and an interior coffee rack l0.

A'conduit il extends through the lower portion ol the boiler l. between the burner 3 and the bottom 2 of said boiler, and com- 'niunicutes ut opposite ends with the lowerportions ol the two percolators 6 and 7. later is i'ree to circulate insaid conduit ll from one percolator to the other, and in thus circulating must pass over the burner 3.

As 'illustrated in Figures l and 2, the conduit ll has an enlarged portion 12er-ranged immediately above the burner. Said enlargement l2 is preferably circular in form and of somewhat greater diameter than the burner, but the shape and dimensions of said enlargement may be changed, as well as the shape and size of the burner, without departing from the present invention. The provision ot' the enlargement in the conduit over the burner permits a larger amount of water to be quickly heated by the direct heat Afrom the burner than is possible when the conduit is made of uniform' size throughout its length, as suggested in VFigure 3 where a straight pipe l is illustrated. lt will be understood, however, that the straight conduit 13, 0r any other suitable form of pipe ina-y be used instead ot the conduit ll having the enlargement l2, and good results be ob# tained. f

Pipes let lead from the lower portion of the tank l to the upper portions oi" the percolators 6 and 7, and are iitted with valves l5 arranofed between said boiler and percolators. Said pipes ll enter the percolators above the coffee racls l0, and are designed to supply water from the boiler to the percolators for moistening the coiee in said racks. lhen the water is heated in the boiler to suiiicient degree, steam will form between the surface ot the water and the cover 5. The pressure of this steam on the surface of the water is sufiicient to cause water from the bottom of the boiler to pass through the pipes 14 to the upper portions of the percolators when the Valves l5 are opened.

The boiler l is connected to the percolators 6 and 7 below the supports for the coffee racks l0 by pipes 16 fitted with valves 17, whereby water from said boiler may be supplied to said percolators for diluting the prepared coffee in the lower portions thereof below the racks l0. Viater may be furnished to the boiler l by a pipe 18 preferably entering the same near its bottom 2. Said pipe 18 is fitted with a suitable cut-olf Valve 19 When the coffee urn is in use, the flame from the burner 3 plays directly upon the enlarged portion 12 of the conduit l1, so that the water in the percolators, or the prepared coffee which will soon occupy the lower portions thereof will be quickly heated by reason of the circulation through said conduit. V:it the saine time, the llame from the burner will indirectly heat the bottom 2 of the boiler l, so that with said indirect heat from the burner together with the ern cess heat radiated by the enlarged portion l2 of the conduit l1, said boiler will also be quickly heated for raising the water therein to the desired steam-forming degree.

I claim:

l. The combination with a boiler, of a burner for heating said boiler arranged a short distance below its bottom, of a percolator at one side of the boiler, and a conduit extendingfrom the percolator to a point over the burner and spaced below7 the bottoni of said boiler, whereby said burner heats said conduit as well as the entire bottom of said boiler.

:2. The combination with a boiler, of a burner for heating said boiler arranged a short distance below its bottoni, of a pereolator at one side of the boiler, and a conduit extending from the percolator to a point over the burner and spaced below the bottom of said boiler, whereby said burner heats said conduit as well as said boiler, the entire bottom of said conduit having an enlarged portion arranged directly above the burner and below the central portion of the bottom of said boiler for the purposespecified.

In testimony whereof, I have signed my naine to this specification.

HENRY J. STROHBAC'H. 

